Valve-lifter



J. H. VONADA.

VALVE LIFTER.

APPLICATION FILED JULY 25. m9.

Patented Feb.17,1920.

1 25 1 2d 1" m u 1 x14- 15 1 n 2% 1F 22 If 24 i} 2e? WITNESSES mum, INVENTOR mafia/2mm A TTORNEYS JOHN H. VONADA, 0F COBURN, PENNSYLVANIA.

VALVE-LIFTER.

Specification of Letters Patent.

Patented Feb. 17, 1920.

Application filed July 25, 1919. Serial No. 313,142.

To all whom it may concern:

Be it known that 1, JOHN H. VONADA, a citizen of the United States, and a resident of Coburn, in the county of Center and State of Pennsylvania, have invented certain new and useful Improvements in Valve- Lifters, of which the following is a specification.

My invention relates to a valve spring compressor, and has reference more particularly to that class of tools known in the trade as a valve lifter designed for facilitating the removal of engine valves.

An object of the invention is to provide a tool or device of this character whereby the spring for an engine V8.1"6 which holds the same to its seat, can be readily compressed with ease and despatch for the easy re moval of the key or pin from the stem of the valve, to permit the extracting of said valve from its casing so that said valve or its seat may be conveniently ground.

Another object of the invention is the provision of a tool of this character which can be readily adjusted and positive in action to sustain the spring in any desired degree of compression without manual exertion for this purpose, and avoiding the danger of bending the valve stem.

A further object is the provision of a tool or device of the character and for the purposes specified which is extremely simple in construction, readily and quickly operated, of great strength and extreme lightness, and which can be readily stowed away in a tool box.

With these and other objects in view, the invention consists in certain novel features of construction, arrangement and combination of parts as will be hereinafter fully described and pointed out in the claims, and illustrated in the drawing forming a part hereof and in which:

Figure 1 is a fragmentary vertical sectional view through a valve casing showing in side elevation and relatively enlarged, a tool constructed and applied in accordance with my invention, a portion of one side plate of the housing being broken out.

Fig. 2 is a top plan view of the tool.

Similar reference characters indicate like parts in the several figures.

In constructing a practical embodiment of the invention in accordance with the illustrated example, the body portion or bar 10 is provided, consisting preferably of a fiat bar bent forward near its lower end 11 for extension and drawn out to form a claw foot 12, being bifurcated for that purpose. On this claw foot (if necessary), may be aflixed a thin, open plate with edges rolled so as to securely hold the valve spring washer or plate.

The upper portion 13 of bar 10 is straight, with a rack on its forward edge formed by gear teeth 14:, milled, cut or punched, and on this upper portion slides a gear housing, said housing being made from sheet metal and including sheet metal stampings 15 extending on each side of the bar 13, secured to a spacer block 16 at the rear of the portion 13 by small screws 13 and riveted to the arm 17 in advance of the said portion 13, said arm 17 having an upwardly projecting portion 17 at its rear end, and a cutout 18 in its lower edge and beneath said upward projection.

This housing and the arm is designed to slide up and down on the bar 10, and within the cutout 18 carries a pinion 19 which meshes with the rack formed by the teeth on the portion 18 of the said bar; said pinion has a square hole therethrough in which is placed a squared shaft 20 having rounded ends 21 and 22 which pass through the side stampings 15 of the housing so that said pinion shaft 20 may rotate in said stampings or side plates 15 of the housing. The end 21 is provided with a transverse opening in which is forced a cotter pin 23 to prevent the pinion shaft from slipping longitudinally, while the end 22 is reduced as at 24 and on this reduced portion is rigidly held one end of a crank arm 25, the opposite end being provided with a crank handle 26 by which the tool is operated and made effective.

To the upwardly projecting portion or abutment 17 is pivoted a locking pawl 27 formed by stamping or forging, the nose portion 28 projecting over said abutment forming a cover for the pinion, and engaging the teeth of the rack, and the forward end 29 extending along the top of the bar 17 and constituting a finger piece by which the arm 17 can be locked at any predetermined point. The arm 17 is provided adjacent its forward or free end with a tapered opening 30 therethrough in which opening is designed to frictlonally fit a reversible centering or valve clamping pin, said pin including a body portion 31 pointed at opposite ends, an intermediate bead 32 separating oppositely tapered end sections of different lengths 33 and 84, which constitute anchoring sections by virtue of which the device may be used on different sized engines where the valves are seated at different depths in the valve chamber.

In Fig. 1 is illustrated a valve A engaging a valve seat 13 in the valve casing C, the stem D of said valve being slidable through the casing, and surrounding the stem is the coiled spring E which normally holds the valve closed on its seat, the spring E being held active upon the valve stem through the medium of the washer F and retaining key or pin G as usual.

Now in applying my improved device, the

various parts of the same are brought to the positions shown in Fig. 1, the bifurcated forward end or claw foot 12 being placed beneath the washer F and straddling the valve stem D and key or pin G, and the arm 17 run along the rack bar 13 until the pointed end of part 34, the centering clamp pin, engages the upper face of the valve A axially thereof. The crank handle 26 is swung upwardly and forwardly or toward the end of arm carrying the pin, and its rotation continued, whereupon the pinion 19 meshing with the rack bar lifts the frame and at the same time the claw foot 12 thereby lifting the washer F supporting the coil spring E, away from the key or pin G, leaving it free of pressure and convenient of access whereupon it can be readily withdrawn from the valve stem D. The spring can be held at any degree of compression by simply throwing the locking pawl 27 into engagement with the rack teeth.

If it is desired to remove the valve for regrinding it or the seat, after the coil spring is compressed, the key or pin G is withdrawn, the arm 17 can then be run up on the upper 01' rack end of the frame until the centering pin is free of the valve case and the arm swung to one side leaving a free and unobstructed space through which the valve can be removed upwardly and a seat grinding tool inserted to regrind the valve seat.

I claim V 1. In a device of the character specified, a frame, a laterally disposed bent bar projecting from its lower end and having means to engage valve parts at its free end, an upper arm member also extending laterally from said frame and slidable upwardly and downwardly thereon, a reversible centering pin having anchoring sections of different lengths carried by said upper arm in alinement with said valve part engaging end of the bent bar, and means carried by said upper arm and engaging said frame, to cause the valve part engaging means and reversible centering pin to approach each other in alinement.

2. A tool of the character specified, comprising a bar bent at its lower portion, said bent portion having its forward end bifurcated to form a claw foot and the upper portion of said bar having a toothed rack on its front edge, an upper arm having a reversible centering pin at one end, said pin having anchoring sections of different lengths, and its opposite end slidably mounted on the toothed rack portion of the bar, an abutment carried by said arm adjacent said rack, a locking pawl. pivotally mounted on said abutment and adapted for engagement with said rack, a housing carried by said bar, a pinion rotatably mounted in said housing and meshing with said rack portion, and means for rotating said pinion exteriorly of said housing.

3. A tool of the character specified, comprising a bar having its lower portion bent and extending forwardly and bifurcated at its extreme forward end to form a claw foot, the upper portion having a toothed forward face constituting a gear rack, an arm slidably mounted on said upper portion, said arm including a metal bar having a vertical abutment adjacent the rack, a cutout portion beneath said abutment, side plates rigidly secured to said bar and ex tending on each side of said racked bar and extended to the rear thereof, a spacing block removably held at the rear of the rack bar between the extended portions of said side plates, a locking pawl pivotally mounted on said abutment, and adapted to engage said gear rack, a pinion positioned within said cutout portion of the arm and rotatably mounted in said side plates, the free end of said arm having a tapered opening there through, and a centering pin having reversely tapered ends adapted to be rigidly held in said tapered opening in alinement with theaforesaid claw foot of the bent lower end of the bar.

JOHN VONADA. 

